Wakeful

wakeful
    adj 1: carefully observant or attentive; on the lookout for
           possible danger; "a policy of open-eyed awareness"; "the
           vigilant eye of the town watch"; "there was a watchful
           dignity in the room"; "a watchful parent with a toddler
           in tow" [syn: {argus-eyed}, {open-eyed}, {vigilant},
           {wakeful}]
    2: (of sleep) easily disturbed; "in a light doze"; "a light
       sleeper"; "a restless wakeful night" [syn: {light},
       {wakeful}]
    3: marked by full consciousness or alertness; "worked every
       moment of my waking hours" [syn: {waking}, {wakeful}]
    

Wakeful \Wake"ful\, a.
   Not sleeping; indisposed to sleep; watchful; vigilant.
   [1913 Webster]

         Dissembling sleep, but wakeful with the fright.
                                                  --Dryden.
   [1913 Webster] -- {Wake"ful*ly}, adv. -- {Wake"ful*ness}, n.
   [1913 Webster]
    

28 Moby Thesaurus words for "wakeful":
      agile, alert, alive, attentive, awake, bright, insomniac,
      insomnious, keen, nimble, on the, on the alert, on the ball,
      on the job, prompt, qui vive, quick, ready, restless, sharp,
      sleepless, slumberless, smart, unblinking, unnodding, unsleeping,
      unwinking, wide-awake